Ethanol
About Energy Balance of Producing Ethanol: Ethanol is Energy Efficient
People interested in ethanol production often ask about the net energy balance of ethanol production. Energy is measured in BTUs or British Thermal Units. In 2004, the United Department of Agriculture (USDA) determined the net energy balance of corn ethanol to be 1.67 to 1. This means that for every BTU of energy used to make ethanol, 1.67 BTUs are produced. These measurements have been confirmed by additional studies conducted by the University of Nebraska and Argonne National Laboratory.
According to the National Corn Growers Association, nine independent studies conducted since 1995 found ethanol to have a positive energy balance. In 2001, the USDA and Argonne Labs found that "only 17% of the energy used to produce ethanol comes from liquid fuels, such as gasoline and diesel fuel. For every 1 BTU of liquid fuel used to produce ethanol, there is a 6.34 BTU gain."
Other studies have been even more......
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